/*
 * Copyright 2011-2013 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.data.hadoop.scripting;

/**
 * The policy for evaluating a script.
 * 
 * @author Costin Leau
 */
public enum EvaluationPolicy {
	/** Evaluate the script only once. */
	ONCE,
	/** Evaluate the script only if it has been modified. */
	IF_MODIFIED,
	/** Evaluate the script on each invocation. */
	ALWAYS;
}
